Many illuminati-PCs in this thread. ;)
The only thing illuminated on my PC are the displays (when they are on) and the letters on my keyboard. The top of my mouse can glow in different intensities or even pulse, but I chose to turn that light off via mouse driver.
My PC case is an unobtrusive "black box" from Cooler Master, which keeps the noise down (at least the PC is more silent than most of my consoles). I bought it in 2006, when I built my last PC from Ground Zero and I still like it a lot... I will probably use it for another decade. ;)
The internal hardware changed of course in these 10 years, but necessary hardware upgrades are much rarer and cheaper these days than in the past:
The Core2Duo E6600 from 2006 was first replaced with a Core2Quad 9550 in 2008 and then with an i5-4670K in 2013, which should suffice probably to 2018/2019 (or whenever the PS5 hits the market with demanding nextgen games).
The mainboard and RAM were only replaced once in this decade (from 8 GB DDR2 / socket 775 to 16 GB DDR3 / socket 1150) and that Haswell/DDR3 setup will probably be good enough for a few years to come.
The boot drive was replaced from HDD to SSD (biggest general improvement ever!) and the HDD for the rest of the data got a 4TB companion. I'll probably buy a bigger (and even faster) SSD next year.
The only component I switch more frequently to keep the PC up2date for new games is my GPU: the 8800 GTX from 2006 (best GPU upgrade ever!) was first replaced with a GTX 275 and later with a GTX 460 (which wasn't much faster than the GTX 275, but I wanted DX10 and my brother wanted my old card). Then Nvidia 3D vision came and doubled my GPU needs, so just a year later there was no alternative to the GTX580. In September 2014 I upgraded to the GTX 970... a great stopgap until the long overdue 14nm/16nm graphic cards finally arrive.
And here is a brief look on my desktop:
Two monitors, both with their advantages and disadvantages.
My good old Dell 2407WFP from 2006 (16:10, 1920x1200, S-PVA panel, 60 Hz) is still my main display. It has better color accuracy, better viewing angles, better black level and a (slightly) higher resolution than the other monitor. Therefore it is used for most non-gaming tasks and most "slow" games.
The Acer GN245HQ (16:9, 1920x1080, TN panel, 120 Hz, integrated IR transmitter for 3D vision) is the specialist for stereoscopic gaming (2 x 60 Hz) or fast games (120 Hz).
If I need more screen space (mostly for Excel), I can use both displays together in extended desktop mode.
I can also send the GPU data via HDMI2.0 to my AV receiver... so the PC has the same access to the TV and the projector for relaxed gaming on the couch as my home consoles.
